Liquid sound deadening device



XR 298469020 5, 1958 M. D. CROWLEY 2,846,020

' LIQUID scum) DEADENING DEVICE Filed Aug. 3, 1955 2 Sheets-Sheet l r. Qf/j, 2

MATTHEWD. Gem/LE) IN V EN TOR.

Aug. 5, 1953 M. D. CROWLEY LIQUID SOUND DEADENING DEVICE 2 Sheets-Sheet 2 Filed Aug. 3, 1955 ei y5- m/r TW/EW 0. max/A1 y United States Patent @hice 2,846,020 Patented Aug. 5, 1958 LEQUID SOUND DEADENING DEVICE Matthew D. Crowley, New York, N. Y., assignor to Matt Crowley Enterprises, Inc. New York, N. Y., a corporation of New York Application August 3, 1955, Serial No. 526,220

1 Claim. (Cl. 181-13? J This invention relates to a liquid sound deadening device and has particular application to those objects which stand outdoors exposed to the action of the elements, particularly rain.

Where the device involved contains a hollow air space therein and a-metallic cover the impingement of raindrops thereon causes an annoying sound to be produced. It is to eliminate this sound that the instant invention was devised.

The conventional window air-conditioning device is an object for which the instant invention is particularly adapted. Such air conditioning device has a portion thereof projecting from the window of the building in which it is installed and the projecting portion has a metallic cover surrounding a hollow air space.

By the use of the instant invention the annoying sound of rain impinging upon the outer portion of the airconditioning unit is eliminated. Furthermore the device of this invention is simple, inexpensive, and simple to install and service.

The invention may be briefly described as comprising a screen which is disposed above the object upon which the liquid such as rain would normally impinge. The screen is disposed above the aforesaid object in spaced relationship.

In order to improve the sound deadening characteristics of this invention there are additional downwardly depending screen members secured to the first-named screen member. In such construction a number of these additional members are employed which are spaced from one another and are preferably rounded in cross-section.

It is also preferable to employ a frame member to hold the screen member employed in this invention. The frame member is disposed about the top of the object and is provided with a perimetral recess in which the lateral portions of the screen member are disposed.

The perimetral recess is open at the lengthwise sides 50 but is not completely open at the shorter sides 51. On sides 51 the recess only goes short of the outer edge as shown in Fig. 4 of the drawings.

The invention will be further described by reference to the accompanying drawings which are made a part of this specification.

Fig. 1 is a side view, partly in section, of an airconditioning unit with the outer portion thereof upon a window frame with the sound deadening device of this invention in operative position thereupon.

Fig. 2 is a rear view of the form of the invention shown in Fig. 1.

Fig. 3 is a detail view of the preferred modification of the sound deadening device of this invention without the object upon which such device is employed.

Fig. 4 is a somewhat diagrammatic sectional view of the form of the invention shown in Fig. 1 taken along lines 4-4 of Fig. 1.

Fig. 5 is a detail view, on an enlarged scale, of the elevation of a portion of Fig. 3 showing the details of the downwardly depending screen members used in this invention.

The invention will now be described in detail by refrence to the specific forrn'thereof as shown in the drawings of this specification.

The sound deadening device 11 of this invention is secured to the object upon which it is to be operative (in this case an air-conditioning unit) by a holding member which is divided into two portions 13 and 15. Spring 14 is secured to both portions 13 and 15 so that the unit can be slipped on and off position easily. Portions 13 and 15 are also secured to frame17. Frame 17 is disposed about the top 16 of air-conditioning unit 12. Frame 17 has a recess 18 (shown only on the front side thereof in the drawing although recess 18 extends about the entire perimeter of frame 17). The lateral portions 20 of screen 19 are disposed within recess 18 of frame 17 and are held therein by suitable fastening devices (not shown).

Additional downwardly depending members 21 are secured to screen 19 and are integral therewith. Down wardly depending members 21 are rounded in crosssection. As shown in Fig. 5 of the drawings downwardly depending members 21 are welded to the wires of screen 19 at points indicated at Site. These members 21 extend across and below the spaces of the wires of the screen 19.

When liquid such as raindrops strike screen 19, which is spaced from the top 16 of air-conditioning unit 12, the screen, because of the holes therein, does not emit sound. The screen also breaks up the drops of liquid as they pass therethrough into such fine form that they do not emit any sound when they reach the top 16 of air-conditioning unit 12. The breaking up of the drops of liquid is aided by the employment of downwardly depending screen portions 21 since the drops, even if they pass through the first screen openings cannot pass unbroken through the downwardly depending portions 21. The downwardly depending portions also give rigidity to the screen and prevent it from vibrating and emitting further sound when struck by raindrops of large size.

The foregoing specific embodiments of this invention as set forth in the specification and drawings herein are for illustrative purposes and for purposes of example only. Various changes and modifications may obviously be made within the spirit and scope of the invention and would occur to those skilled in this art.

I claim:

A device for deadening the sound of impingement of rain upon an air conditioning unit comprising a frame member formed with upstanding edges lying upon the top portion thereof and provided with a lengthwise centrally disposed perimetral recess within said edges; 21 screen member provided with openings therein and formed with spaced downwardly depending portions extending across said openings and disposed across said frame member and spaced from the top portion of said air conditioning unit with the edge of portions of said screen member secured within said recesses within said frame member, a holding member formed with two spaced portions secured to said frame member and disposed about said air conditioning unit, and a spring member joining both portions of said holding member to one another.

References Cited in the file of this patent UNITED STATES PATENTS 616,6l7 Hulse Dec. 27, 1898 1,112,401 Allen Sept. 29, 1914 1,360,311 Padgett NOV. 30, 1920 2,335,881 Persinger Dec. 7, 1943 o y 4 s n 

